<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

<script>
export default {
  created() {
    //在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem('store')) {
      this.$store.replaceState(Object.assign({}, this.$store.state, JSON.parse(sessionStorage.getItem('store'))));
    }

    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener('beforeunload', () => {
      sessionStorage.setItem('store', JSON.stringify(this.$store.state));
    });
  }

}
</script>

<style lang="less" >
html {
  width: 375px;
  height: 720px;
  
}
</style>
